The White House press office determines full lid timing based on the conclusion of the president's public schedule, including executive time blocks, policy meetings, signing ceremonies, travel movements, and any late remarks or briefings. For the September 7-12, 2026 window, trader assessments centered on President Trump's itinerary featuring closed-press executive time, in-town and out-of-town pool call times, a 9/11 observance at the Pentagon, Oval Office activities, and a departure for Ireland. Routine patterns show lids often called between 6:00 and 7:30 PM absent major developments, though weekend guidance, holiday proximity, and schedule changes can shift outcomes. Market resolution relies on official pool reports confirming the first explicit full lid before 6:30 PM ET each day.